Of course I believe most of this is already encrypted because most of the pages are HTTPS, but even so it seems risky when anyone with a WIFI card could intercept the data. I also realize that the last TOR relay will be able to see my data, but it seems to me this is no different than the servers which are routing my data when I am using a landline, and as I said I believe HTTPS already provides some security. If my assumptions are wrong please let me know.

. Cryptographic number generators have the property that they (shouldn't) give up their internal state by their external outputs quickly. So, unless the attacker gets to see a lot of outputs - node choices - without reseeding from real entropy they are pretty much screwed provided the cryptograpphic prng isn't broken.

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'''Is there a signal i can send the tor client to tell it to switch circuits immediately?'''